Alan Cox wrote:> On Llu, 2006-05-15 at 13:00 -0400, Jeff Garzik wrote:>> * PIO-based I/O is now IRQ-driven by default, rather than polled>> in a kernel thread. The polling path will continue to exist for>> controllers that need it, and other special cases. (Albert Lee)> > How will this be selected ? Passing ->irq = 0 ?

It is selected at runtime by passing a polling flag to ata_taskfile.

That flag, in turn can be set by anything -- driver flags (for controllers that always require polling), user variable requested at runtime, whatever.

> For ata_piix given you've destabilized it a bit would now be a good time> to submit the patches to fix the timing, register scribble and incorrect> ATAPI caching ?